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    <title>练习</title>
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      width: 100px;
      height: 30px;
      color: red;
      background-color: green;
      text-align: center;
      line-height: 30px;
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    span{
      font-size: 25px;
      font-style: italic;
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    #bx{
      font-weight: normal;
      text-shadow: blue -5px 5px 3px;
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    #xyj{
      text-decoration: underline;
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    a{
      text-decoration: none;
      font-weight: bold;
      font-size: 20px;
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<body>
<div id="ldh">刘德华</div><div>张学友</div>
<span>香蕉</span><span>苹果</span>
<h1 id="bx">冰箱</h1>
<h1 id="xyj">洗衣机</h1>
<a href="http://www.baidu.com">百度</a>
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